I cannot find any differences in the data sesion properties. I just installed service pack 3, hoping it would fix the problem but no luck. The docs did claim that service pack 3 solved a bug in remote data sessions, but it must have been a different bug. I am totaly baffeled now. This problem only came up recently, and only seems to occour in this one form. This form is the base for several other custom forms that will be written to meet specific needs. The data environment of the problem form will be the same for most other forms with different filters.